The committed amount, subject to final pricing, under an accelerated share repurchase agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

The cash outflow to reacquire common stock during the period.

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Amount of stock repurchase plan authorized.

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No definition available.

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- Definition

Number of shares that have been repurchased during the period and are being held in treasury.

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- Definition

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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Equity - Common Stock Repurchase Authorization (Details) - USD ($) shares in Millions, $ in Millions		1 Months Ended	12 Months Ended
	Sep. 05, 2018	Oct. 12, 2018	Sep. 01, 2016	Aug. 10, 2018	May 31, 2018
Equity, Class of Treasury Stock [Line Items]
Common Stock Repurchase, Authorized Amount					$ 10,000
Value of Treasury Shares Acquired			$ 125
Accelerated Share Repurchase Agreement
Equity, Class of Treasury Stock [Line Items]
Accelerated Share Repurchase, Agreement Amount				$ 1,000
Accelerated Share Repurchase Agreement \| Subsequent Event
Equity, Class of Treasury Stock [Line Items]
Payments for Repurchase of Common Stock	$ 1,000
Treasury Shares Repurchased (in shares)	14
Value of Treasury Shares Acquired	$ 750
10b5-1 Plan and Other Repurchases \| Subsequent Event
Equity, Class of Treasury Stock [Line Items]
Payments for Repurchase of Common Stock		$ 653
Treasury Shares Repurchased (in shares)		15